Noted That:

• To install correctly this multisite-language-switcher.zip .
• Fisrt Download the multisite-language-switcher.zip to your computer
• Extract/Open multisite-language-switcher.zip to Your Computer.
• Then, Find readme.txt file inside multisite-language-switcher.zip and Open readme.txt .
• Now, Read the Requirements of this plugin. Which Wordpress Version and PHP Version are required to run this Plugin in Your Wordpress Site.
• Then, Follow the Tips Below.

Start the Tips:

1. First Download " multisite-language-switcher.zip " Plugin to your Local Computer. (Click Download)

2. Then, Login to your " yourdomain.com/wp-admin " Dashboard.

3. Then, Click on " Plugins " + " Add New " from left sidemenu of Dashboard.

4. Now, Click on "Upload Plugin" button.

5. Now, Browse " multisite-language-switcher.zip "  Downloaded plugin from your computer, Where you downloaded multisite-language-switcher.zip According to Step – 1 Above then, click on " Install Now"

6. Now, Click on " Active Plugin"

7. Then, See left sidemenu. " Multisite Language Switcher " folder is added on left sidemenu. Now, Click on " Multisite Language Switcher " folder.

   Noted that: If you do not see " Multisite Language Switcher " folder on left sidemenu then, see at left sidemenu " Settings " or " Tools ".

8. Now you configure yourself oR Watch video tutorial below about  Multisite Language Switcher Configurtions and Settings or How to work " Multisite Language Switcher " in your WordPress site.

After Activated Plugin According to Step-6 then,

1. Go to " Plugins " + " Installed Plugin " from Wordpress Admin Panel Leftside Menu.
2. or Direct go to: https://yourdomain/wp-admin/plugins.php
3. Then, Find " Multisite Language Switcher " Activated Plugin from Plugin List.
4. Then, Click on " Settings " from Plugin that is Multisite Language Switcher
5. Now, Edit/Add/Config the setting and Click on " Save Changes " button,

• Download the plugin and uncompress it with your preferred unzip programme
• Copy the entire directory in your plugin directory of your WordPress blog (/wp-content/plugins)
• Activate the plugin in your plugin administration page (by the network administrator on all the blogs or by the root blog administrator for each particular blog).
• You need to activate the plugin once in each blog, set the configuration in Settings -> Multisite Language Switcher

Now you can:

• connect your translated pages and posts in Posts -> Edit or Page -> Edit
• connect your translated categories and tags in Posts -> Categories or Post -> Tags
• connect your Custom Post Types and Custom Taxonomies across languages
• use the widget, the Gutenberg block, the shortcode [sc_msls] and/or a content_filter which displays a hint to the user if a translation is available
• find also a shortcode for the widget [sc_msls_widget]
• optionally you can place the code directly in your theme files

Review the Multisite Language Switcher Website for more information.